I am concerned ____ it that I can’t concentrate ____ my work because of headache.
| A．of; on | B．of; of | C．about; on | D．about; to |
Reportedly yesterday a group of American soldiers were walking along the road in Iraq when a bomb（炸弹） was _____, three of whom were killed.
| A．set about | B．set off | C．set up | D．set out |
He is never allowed ________ in the room.
| A．to smoke | B．smoking | C．smoked | D．to be smoked |
They want to know ________ do to help us.
| A．what can they | B．how they can | C．what they can | D．how can they |
— I must have a balanced diet. I carry too much fat.
— ________.
| A．Congratulations | B．Good idea | C．Good luck | D．Don’t mention it |
—Have you heard the story of “The Merchant of Venice”?
—No. When and where does the story ______?
| A．take up | B．take on | C．take place | D．take off |